Do you think a plastic/aluminum blade in a chop saw would work to cut these?

I assume a bandsaw would be best, but I don't have one of those. Table saw and a chop saw I do have, and I've cut aluminum in those (with backing), but these heatsinks have a lot of fins, I'm not sure how well that would work.

I've seen problems with thin pieces (1/8") of Al (L piece) going through the table saw; sometimes the piece of Al 'flexes' and then it tends to 'shoot'. I started clamping a piece of wood on the top of the Al L, in addition to the wood fence behind it.

Kickback is not fun but that should be less of an issue with the Compound Miter saw.